In either case it would depend on if they have kept their plant list up to date. If you do have extras of one that someone lists as wanting, you can always tree mail them to see if they are still interested. And if I see a post with someone looking for a specific iris that I have I try to make a note on my plant list to remind me (such as "to Darcy").
To find their plant list it is usually easiest for me to go to their profile page then pull up their plant list. For example - if I click on your site name above it takes me right to your profile, then I can click on your plant list. I am sure there are many ways that people do this on the forum, but that is what works for me.
